Compare Java and data serialization

gistfile1.java

package org.jboss.as.test.smoke.jms.objectmessage;

import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.UUID;

public class Main {

    static class Payload implements Serializable {

        private static final long serialVersionUID = -6537086985098258447L;

        private final int field;

        private final String text;
        
        Payload(final int field, String text) {
            this.field = field;
            this.text = text;
        }
        
        public int getField() {
            return field;
        }
        
        public String getText() {
            return text;
        }
    }
    
    public static void main(String[] args) throws Exception {
        int field = Integer.MAX_VALUE;
        String text = UUID.randomUUID().toString();
        
        Payload payload = new Payload(field, text);
        
        ByteArrayOutputStream baos = new ByteArrayOutputStream(1024);
        DataOutputStream dos = new DataOutputStream(baos);
        dos.writeInt(field);
        dos.writeUTF(text);
        baos.flush();        
        int dataSize = baos.toByteArray().length;
        
        baos.reset();
        ObjectOutputStream oos = new ObjectOutputStream(baos);
        oos.writeObject(payload);
        baos.flush();
        int objectSize = baos.toByteArray().length;
        
        System.out.println("data to bytes => " + dataSize);     // => 42    
        System.out.println("object to bytes => " + objectSize); // => 154
    }
}